Quiz on Microscopic World I

Hydrogen atom can form

(1) hydrogen ion by losing one electron.

(2) hydrogen molecule by sharing electrons.

(3) hydride ion by gaining one electron.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

The relative atomic mass of helium is

(1) the same as its relative molecular mass.

(2) the same as the relative molecular mass of hydrogen.

(3) the same as its formula mass.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

Lithium reacts with chlorine to give a compound X.

(1) X is an ionic compound.

(2) The formula of X is LiCl.

(3) X is called lithium chloride.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

Beryllium oxide

(1) is an ionic oxide.

(2) has a chemical formula of Be₂O₂.

(3) retains the chemical properties of beryllium.

• (1) only

• (2) only

• (1) and (3) only

• (2) and (3) only

Boron trifluoride

(1) is a compound formed between a metal and non-metal.

(2) is a covalent molecular compound.

(3) has a molecular formula of BF₃.

• (1) only

• (2) only

• (1) and (3) only

• (2) and (3) only

Which of the following compounds could be produced when carbon burns in air ?

(1) methane.

(2) carbon monoxide.

(3) carbon dioxide.

• (1) only

• (2) only

• (1) and (3) only

• (2) and (3) only

Which of the following statements concerning nitrogen are correct ?

(1) It exists as diatomic molecules in the air.

(2) It can react with hydrogen to form ammonia under certain conditions.

(3) It reacts with oxygen in the air during lightning to give nitrogen monoxide.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

Oxygen can form two types of oxides with hydrogen. Which of the following statements about these oxides are correct ?

(1) The two types of oxides are water and hydrogen peroxide.

(2) The two types of oxides are formed together when hydrogen is burned in air.

(3) The chemical formula of hydrogen peroxide is H₂O₂.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

Fluorine has one naturally occurring isotope. The relative atomic mass of fluorine is 19.0. It can be deduced that

(1) the mass number of a fluorine isotope is 19.

(2) the relative molecular mass of fluorine is 19.0.

(3) the formula mass of a fluoride ion is 19.0.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

Which of the following statements concerning neon are correct ?

(1) Neon is chemically inert.

(2) Neon exists as diatomic molecules.

(3) The outermost electron shell of a neon atom has an octet structure.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)